Hello! I'm pretty new to the planted tank world and was wondering is there a certain amount of plants one tank should have or should not have? Right now I have a small java fern and an anubias plant in my 2.5 gal tank but soon I plan on starting my 10 gal tank. I hope this isn't a silly question but I was curious. Also any other recs on plants for my 10 gal tank?

it all depends on the size and shape of the tank, and the kinds of plants you use. i find it best to provide at least 1/3 of the tank surface covered in a "canopy" so they can escape the light when they want to, and then have a low-lying semi-sparse "yard" to swim through.